Know Your Environment. Protect Your Health.

4:2 Fluorotelomer Sulfonic Acid (4:2 FTSA)

Deerfield

4:2 Fluorotelomer Sulfonic Acid (4:2 FTSA) is a member of a class of chemicals called per- and polyfluoroalkyl substances or PFAS. These chemicals were used in the production of non-stick, stain repellent and chemically inert coatings. Click here to read more about perfluorinated chemicals.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND70ND
2020N/A00N/A
2021ND50ND
2022N/A00N/A
2023N/A00N/A

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1 ppt

The EWG Health Guideline of 1 ppt for 4:2 fluorotelomer sulfonic acid (4:2 FTSA) was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water.

ppt = parts per trillion

All test results

Date Lab ID Result
2018-08-02SWIN1808021020GSCND
2018-08-02SWEF1808021030GSCND
2019-04-29SWEF1904291150GSCND
2019-04-29SWIN1904291200GSCND
2019-05-28SWIN1905281345MKND
2019-06-24SWIN1906241230KERND
2019-07-29SWIN1907291500MKND
2019-08-26SWIN1908261145GSCND
2019-09-23SWIN1909231155GSCND
2021-01-22SWIN2101221015RGND
2021-03-11SWIN2103110955SKND
2021-05-10SWIN2105101100GSCND
2021-07-16SWIN2107161100GGAND
2021-09-17SWIN2109171200GGAND